SOLUTION: In a lottery game, a single ball is drawn at random from a container that contains 25 identical balls numbered from 1 through 25. Use equation (1) (not given to me) to complete the

Algebra ->  Probability-and-statistics -> SOLUTION: In a lottery game, a single ball is drawn at random from a container that contains 25 identical balls numbered from 1 through 25. Use equation (1) (not given to me) to complete the      Log On


   

Question 929407: In a lottery game, a single ball is drawn at random from a container that contains 25 identical balls numbered from 1 through 25. Use equation (1) (not given to me) to complete the probability that the number drawn is prime or greater than 20.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Count the prime numbers from 1 to 25. (2,3,5,7,11,13,17,19,23). 9 of them
Count the numbers greater than 20. (21,22,23,24,25). 5 of them
Count the numbers in both groups: (23). 1 of them.
So then,
P=%289%2B5-1%29%2F25=13%2F25